A freshman college student at University of Maryland has died of adenovirus, the virus that has killed 11 immunocompromised children at one New Jersey care facility.

Olivia Paregol, 18, suffered from Crohn's disease and was diagnosed with pneumonia on November 9.

She developed the respiratory infection as a complication of a particularly severe strain of adenovirus, a common illness from which most people recover on their own, but that can prove deadly for those with weakened immune systems.

After nearly a week fighting for her life in an intensive care unit, Olivia died on Sunday.

Though she'd been seriously ill, Olivia was not tested for adenovirus until another student was diagnosed with the virus, and her father, Ian, told WJLA that the school did not announce cases to families or the student body.

As her family and the University of Maryland grieve the loss of the young woman, they warn that five others have been diagnosed with adenovirus, and that illnesses should be taken seriously.

Olivia Paregol, 18, contracted adenovirus while attending University of Maryland and undergoing treatment for Crohn's disease. The college freshman died of the virus on Sunday

She apparently contracted adenovirus while being treated, and her father told WJLA that his daughter had had continuous problems with mold in her dorm room.

'She definitely appeared to be getting sicker and sicker,' Ian told WJLA.

In its Tuesday announcement of an adenovirus death to the University of Maryland community, the school said it was first aware of an 'isolated case' of the viral infection, though it isn't clear if that referred to Olivia.

At least one of the infections was discovered to be from strain 7 of the virus, one of the most savage and dangerous forms.

University of Maryland said it had been 'closely monitoring' the school for infections and coordinating with area health systems and officials.

But Ian did not feel adequately in the loop about the outbreak or his daughter's condition.

'I was told there were two students with the virus when I called to figure out what my daughter had, which means they knew it before my daughter,' he said.

'It was the worst nightmare that a family or certainly a parent can have to endure.'